32.3. Configuration
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## 32.3. Configuration

jit determines whether JIT compilation is enabled or disabled.

As explained in Section 32.2 the configuration variables jit_above_cost, jit_optimize_above_cost, jit_inline_above_cost decide whether JIT compilation is performed for a query, and how much effort is spent doing so.

For development and debugging purposes a few additional GUCs exist. jit_dump_bitcode allows the generated bitcode to be inspected. jit_debugging_support allows GDB to see generated functions. jit_profiling_support emits information so the perf profiler can interpret JIT generated functions sensibly.

jit_provider determines which JIT implementation is used. It rarely is required to be changed. See Section 32.4.2.

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32.2. When to JIT? | Home | 32.4. Extensibility